發(fā)布時(shí)間：2018-07-18 11:39

【摘要】：濕式離合器的溫度場(chǎng)與熱應(yīng)力場(chǎng)的檢測(cè)一直是改進(jìn)離合器摩擦片結(jié)構(gòu)的關(guān)鍵點(diǎn)之一。目前,解決測(cè)溫系統(tǒng)的響應(yīng)速度以及溫度測(cè)點(diǎn)的布置方案是研究的重點(diǎn)問(wèn)題�；趪�(guó)內(nèi)外近些年對(duì)摩擦表面物理場(chǎng)的理論研究,本文針對(duì)這些重點(diǎn)問(wèn)題進(jìn)行了深入探討,提出了一種能夠?qū)崟r(shí)、準(zhǔn)確地得到濕式離合器摩擦表面溫度場(chǎng)與熱應(yīng)力場(chǎng)測(cè)量系統(tǒng)的設(shè)計(jì)方法。根據(jù)對(duì)離合器實(shí)際運(yùn)行工況下的摩擦表面溫度場(chǎng)與熱應(yīng)力場(chǎng)進(jìn)行有限元仿真,對(duì)溫度傳感器布陣方式進(jìn)行了研究,為測(cè)量系統(tǒng)的設(shè)計(jì)提出了依據(jù)。分析了物理場(chǎng)分布特征,得到離合器運(yùn)行過(guò)程中高溫?zé)狳c(diǎn)的位置與產(chǎn)生熱應(yīng)力較大處的位置,設(shè)計(jì)了能夠以較少的測(cè)點(diǎn)描述整個(gè)摩擦表面溫度場(chǎng)分布的布陣方案�；跍y(cè)量系統(tǒng)要求的快速測(cè)溫原則,選擇了合適的熱電偶和放大器芯片,設(shè)計(jì)了無(wú)線供電方式對(duì)離合器內(nèi)系統(tǒng)供電,并以電路屏蔽技術(shù)和外部屏蔽技術(shù)兩方面相結(jié)合的方式處理外部干擾。研究了最小二乘擬合法剔除野值和小波分析濾波的程序進(jìn)行信號(hào)處理。利用熱電偶的動(dòng)靜態(tài)標(biāo)定驗(yàn)證測(cè)溫系統(tǒng)的準(zhǔn)確性和實(shí)時(shí)性。最后通過(guò)模擬真實(shí)情況的臺(tái)架試驗(yàn)檢驗(yàn)本文所設(shè)計(jì)測(cè)量系統(tǒng)的有效性。
[Abstract]:The detection of temperature field and thermal stress field of wet clutch is one of the key points to improve the structure of clutch friction disc. At present, it is an important problem to solve the response speed of temperature measurement system and the layout of temperature measuring points. Based on the theoretical research on the physical field of friction surface at home and abroad in recent years, this paper makes a thorough discussion on these important problems, and proposes a new method which can be used in real time. The design method of measuring system of temperature field and thermal stress field on friction surface of wet clutch is obtained. According to the finite element simulation of temperature field and thermal stress field of friction surface under the actual operating condition of clutch, the layout of temperature sensor is studied, which provides the basis for the design of measuring system. The distribution characteristics of physical field are analyzed and the position of hot spot at high temperature and the position where the thermal stress is larger are obtained during the clutch operation. The array scheme which can describe the temperature field distribution of the whole friction surface with fewer measuring points is designed. Based on the principle of rapid temperature measurement required by the measurement system, the suitable thermocouple and amplifier chip are selected, and the wireless power supply mode is designed to supply power to the clutch inner system. The external interference is dealt with by the combination of circuit shielding technology and external shielding technology. The program of eliminating outliers and wavelet analysis filter by least square fitting method is studied for signal processing. The accuracy and real-time of the temperature measurement system are verified by the dynamic and static calibration of the thermocouple. Finally, the validity of the measurement system designed in this paper is verified by simulating the real situation.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TH133.4

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